B.Sc Maths

As a Mathematics graduate, you would have superior numerical skills, therefore MBA in fiancee can be very good option for you. If you have good computing skills, you can also evaluate MBA in IT with specialization in Data Analytics as an alternate. You are eligible for all MBA specialization options. You may chose any based on your interests, strengths and personality to excel in professional career.

Hello Riyanka,
Following are the higher studies options after B.Sc. in statistics:
M.Sc. in Actuarial Science
M.Sc. in Library and Information Science
M.Sc. in Quantitative Economics
MCA
Masters in Math
Masters in Statistics
MBA
P.G. Diploma in Stat. Methods with Applications
Specialist Development Program in SQC
JRF & SRF Rules
Junior/Senior Research Fellowship

Yes, you can get admission in St. Xavier's College, Mumbai with 81%.
Good luck!

Yes, you can pursue PGDCA from a deemed university. You can also prepare for CAT or other competitive exams.

The best colleges to pursue B.Sc in mathematics are:
1. St. Xaviers College
2. Elphinstone College
3. Ramnarain Ruia College
Lots of career options are open for you, but you should be careful, and select the course as per your interest. Please do not give priority to any other factor than your own interest. Here are few options for you:
1. M.Sc (if you are interested in teaching)
2. MCA
3. MBA
4. Any other competitive exam for jobs like admin, services, banks, etc.
According to me, you should meet a good career counselor for personality and interest psychometric test. Apart from your personality test.

You can prepare NET & JRF for higher educational course in your stream. You can search a job after B.Sc. or can opt for M.Sc in the same.